lets see if you guys like my idea
 

ok.... i'm going to put a nice sound system in my car but i'm not sure what i want to do. i was thinking about not having the back seats and taking a piece of 1/4 plywood and bending in into a hump from the bottom of the rear window to the floor then putting 2 10" subwoofers and 2 6x9 speakers in it. i like bass and theres not alot of room in the back or a p-car so a regular box because of the hump in the middle of the back seats. what do you guys think? any other segestions?:)

Change the exhaust
 

Put a Bursch on there, or maybe stick some Megaphones on your heat exchangers. You don't need that sound system. Trust me. If you really want the sound system get a Honda! Good luck.

Well you've obviously got excellant taste in vehicles :D and as a coincidence I had thought about the same thing, as long as it didn't involve cutting the frame.
Something you might want to consider is using (very heavy) 3/4 in. medium density fiberboard instead because all that base will make a heck of a rattle if it's not properly channeled. Plexyglass is better but may be out of the price range.
Industrial gluing it as well as screws at the seams will keep the thing air tight. Also the box should have the shape and volume that the speakers are rated for: too much air inside and the speakers won't handle power and too little will cause muting. The bass's will play best aimed at a soild part of the understructure but you might want to have the 6x9s bounce off the side windows or roof. Tweeters sound best aimed right at your ears.
You might consider an ajustable electronic cross-over for fine tuning and a seperate amp for the subs.

Heres some links- I think one of them has a nice looking frame to put on the rear shelf instead.
http://www.parisaudio.com/
http://www.innovativeaudio.com/
http://www.northstarmotorsports.com/
http://www.caraudioinnovations.com/
http://www.midwest-usa.com/
http://www.audioasylum.com info too
http://www.audiogon.com

ytnuklr ooo i am putting nice exhuast on when my engines done. headers with megaphones untill i get pulled over for being to loud then i'll go with a bursch

BEST OF BOTH
 

EXCELLENT IDEA. BEST OF BOTH WORLDS.

;)

Hi, Justin,

What if you could leave the back seat alone and still get bass?
What if you could move the weight of the sub enclosure down and towards the front where it should be? Would be better, right?

I am just finishing the subwoofer install in my 911, so this is a good time to tell you how I did this. I took out the small plywood board in the passenger footwell to get more space. Then, after carefully masking the entire footwell, I used the footwell as a mold for a fibreglass sub enclosure. The front of the box (facing the passenger) is made of 18mm plywood and will be covered with a custom carpet. It has the same angle as the original plywood board.

By doing this you will of course reduce the passenger foot-space, but far less than you would think (And who gives a d@mn about the passenger anyway?). I use only one 10", which I think will be enough to get good bass. You could use one 12", but it would be a tight fit. I would recommend spending the amount you were planning on spending on two 10"s on one high quality 10" instead. Make sure you find a sub that will play in small enclosures, as this will determine how big the fibreglass box has to be. Remember, you MUST use the recommended size or it will all be a waste of time and money. My box is around 17 litres, which is quite big. But some subwoofers only need 10-12 litres (approx. the size of the cardboard box they come in from the shop).

By the way, I don't think you should use 6"x9"s (or any other size speakers) in the back. You want the music to come from the front. Go with 6.5"s in the doors for mid-frequency and tweeters on the the dashboard.

You MUST have an amplifier to run the sub. Use a 4 channel with channel 1 and 2 for the front speakers and cannel 3 and 4 (bridged) for the sub.

A picture says more than a thousand words.
Think I'll stop now and post a some pictures later.

MORE NOISE?
 

One of the things that I built into my luggage deposit was the music system. The luggage deposit was built with 1/4" plywood, on the top surface under the carpet is a 12" sub wofer and mounted on the front face are the rear channel speakers and a small strorage area. I mounted a 5 channel amp under the passenger seat.

Here is another question. How can I hook up a good pair of head phones to the music system so my wife can hear the Dixie Chicks at speed. I was thinking of something like Bose or what are they called David Clark the aircraft stuff or even as simple as a pair of Wilson Sound Barrier Muffs with ear phones stuck inside.

If ya' want music then build the system but don't expect to really hear it. When the car is parked and the motor is off the system sounds good for the bucks involved (little), when the motor is running it equals the old Delco in my 55' Chevy pickup back in 66".

Randy Jones
1971 911

Re: MORE NOISE?
 

This is later.
Here is a picture: :rolleyes:

Whatever unit you get, make sure its satellite ready. XM or SIRIUS service can be had for a monthly subscription rate. Once you try commercial free satellite radio, you'll never go back to FM.
regards,
jlex.

randy i like the way that looks! could you post a couple pictures from different angles. please.

There are some really nice aircraft headphones that I would love to get working for my car...they have a microphone on the outside that takes listens to the noises outside of the headphones and creates an opposing wave function of noise to cancel out the noise!

Really useful for those long road trips where the "music" is just annoying after a while.

Justin,

I did a similar installation of two 8" nakamichi subs using the high density MDF and still retained use of my rear seats (not that any normal sized human will sit back there).

By cutting the board to fit on about a 45 degree angle from the bottom of the back seat forward to the floor at teh bottom of the front seat with a seperating piece by the "hump" in the center of the car you create 2 chambers that produce great bass when using the right equipment.

I made the piece fit so well that when I padded it with 1/4" foam, wrapped it in matching leather that i picked up at a local fabric store, mounted teh subs in it, it only needed one central screw into the floor to hole it in place without vibrating...

Only one problem....

My 79 911 SC... with a cam'd out, mahle P &C's motor, SSI's and a Bursch dual in dual out Muff, no matter how loud I turn the stereo up, if I am whailing along the car sounds soooooo sweet, I forget the stereo is even on.... Quote:

"He who owns Porsche learn to appreciate different sounds."http://www.pelicanparts.com/support/...s/dazzler1.gif

Another pic
 

Here is a shot of the luggage depsoit "nude".

I cut the flat center section out of a 16" sub woofer grill screen for support over the sub. Didn't want the carpet to fall into the hole after awhile. Sub was to deep to fit in the middle so I put it on the passanger side.

Fiberglass over the corners and around the storage box and a coat of resin over the top of the whole thing.

I bought a piece of 3/4"x 2" CVG Fir and made the trim for the front of the top. I wanted something to keep stuff from sliding off.
The top of the board was rounded off and the material went over the top. Some screws and trim rings to hold it to the front of the box.


Randy Jones
1971 911